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| author |   Matthew Wilcox <willy@linux.intel.com> | 2016-05-20 17:02:23 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 17:58:30 -0700 |
| commit | 7b60e9ad59a31dd98c2f7ef841e2882c2b0e0f3b (patch) | |
| tree | cca917997c4005d2607172a9389b63172feab0ca /tools/testing/radix-tree/linux/kernel.h | |
| parent | radix-tree: rewrite __radix_tree_lookup (diff) | |
| download | linux-dev-7b60e9ad59a31dd98c2f7ef841e2882c2b0e0f3b.tar.xz linux-dev-7b60e9ad59a31dd98c2f7ef841e2882c2b0e0f3b.zip | |
radix-tree: fix multiorder BUG_ON in radix_tree_insert
These BUG_ON tests are to ensure that all the tags are clear when
inserting a new entry. If we insert a multiorder entry, we'll end up
looking at the tags for a different node, and so the BUG_ON can end up
triggering spuriously.
Also, we now have three tags, not two, so check all three are clear, and
check all the root tags with a single call to BUG_ON since the bits are
stored contiguously.
Include a test-case to ensure this problem does not reoccur.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jan Kara <jack@suse.com>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions